Hi Paul-
As Cactus stated, gearslutz is the best place for this discussion. Although, you'll likely start a 28 page war.
Honestly, you don't need to bog yourself down with tu-be or not tu-be (trying to be clever here:)). You just need to focus on what your end goal/results are. Some of the best mics and pres are not tube-based, and some are. Depending on your budget, there are a lot of good mic pres that will give you the results that you are looking for that are not tube pres. Neve and Neve clones, API and API clones are some of the most popular out there. Many 1970s hits were recorded using these pres as the frontend.
Mics are similar in that there are some absolutely fantastic tube mics and some fantastic non-tube mics out there. In the under $1000 range, my personal feeling as that the good non-tube mics are better sounding than the inexpensive tube mics (this would start a war on gearslutz). The mics sold by Shure (KSM series), AT, Blue, etc. can sound really good in this price range.
Your mic selection is really going to depend on the sources you plan to record. Many mics have their ares where they are best. Some are great for vocals and some are great for kick drums. Of course there are mics good for all the other things too! Generally, there is a purpose/reason why you would use one vs. another. Small diaphragm condensers have very quick transient response and create shimmery highs. Thus they are often used for cymbals (overheads), acoustic guitar, etc. But, you wouldn't use one on a bass guitar or a kick drum. Most (but definitely not all) folks seem to record vocals with a large diaphragm condenser. These mics are very versatile and can be used on most sources. One issue with them is that they tend to be the most expensive type. Dynamic mics in the form that most people associate with handheld vocals are also pretty capable of being diverse. They can work on most sources, are durable and don't cost nearly as much. The Shure SM 57/58 are examples of mics that can basically do anything for $100.
Your monitor question is interesting. It seems to be pretty rare anymore to use passive monitors. I had used them for a while, but they're getting more and more difficult to find. But for not very much money, you can acquire a great pair of powered monitors. If you still want passive, Tannoy has some good ones in their Reveal series.
Last, if I were you, I would look at my budget and goals together. Most people go crazy over mics. I think it is because we "see" it and it is also the transducer that turns our acoustic waveforms into electrical signals. However, the wrong mic on the wrong source just doesn't sound that great. In addition, if you stay with this craft, you will undoubtedly acquire more mics over time. A good mic pre will make all of them sound better and help them to shine in your mixes. The good pre is basically a foundation for mics to sit on. They're not nearly as sexy, but they do make a significant difference across all of your sources and the mics that you would use to capture them.
Monitoring is hugely important too. No doubt you want your mixes to sound great. If you can't hear what is going on in your mix, it will be hard to create a mix that sounds great across different systems. When you combine this with the room/space that you are mixing in, it can dramatically impact the quality of your mix. If you have the opportunity to try some before committing, you will be best off. Remember that monitors are supposed to provide you with as correct a representation of the sound as possible. However, their effectiveness is largely influenced by the space where you have them installed-- even the location in the room. There are many threads on many forums about this topic, and there really is no substitute for creating a good space for mixing.
In closing, I wish you well. Many of us have chased the desired sound with gear. Your interface choice was really strong. Your next investment IMHO should be on something that is foundational that you won't want to replace as you get better and more familiar with the craft. I've kept most all of the mics that I've owned, as all of them have a purpose at some time. However, I've bought and sold a host of mic pres and didn't settle until I got some really good ones. Regardless of what people say, there really is a difference. My cheapest mics sound soooo much better through the good pres than my expensive mics sounded through the bad ones. It's one guy's opinion, but a $3000 mic won't sound it's best without a decent pre behind it. The best ones start at about $599, but they'll last you a lifetime. Good monitors will also really improve your mix, but they won't help you capture the performance.
Sorry to be so rambly....best of luck to you!